Real-time measuring system of eye-gaze location and writing pressure in calligraphy

In this study, a basic system which measures simultaneously a line of eyegaze and a hand movement was developed in order to extract the skilled elements in calligraphy. This system consists of an eye mark recorder and a three-dimensional position measurement device. The coordinates of a line of eye-gaze and a hand movement were unified as a common coordinate system. Even if the head of a participant is not fixed during the measurement, this system enables us to calculate an eye position by preliminarily calibrating the physical relationship between a camera and a receiver of three-dimensional measurement device. To confirm the effectiveness of the developed system and to examine the accuracy of the system, the participants were required to look at fixation points under a different condition of the head posture. Using this system, calligraphic tasks were imposed on participants. Moreover, the writing pressure measurement system was developed in order to add to the simultaneous measurement system of eye-gaze location and the brush tip movement. We made an attempt to extract skilled elements in calligraphy on the basis of the writing pressure and the eye-hand coordination characteristics.